There was a horrible rumor all over social media yesterday, claiming that Sylvester Stallone had passed away due to prostrate cancer. It's NOT true. Sly himself felt the need to post to Instagram to let the world know that he is fine. Check out his posting below. Also, while he didn't explain those photos of him looking old and frail, our guess is they are shot from his new movie, Creed 2. If you remember, Rocky had cancer in the Creed, so my guess is he's still battling the illness. We're just happy that Sly is doing well.